Identification of microorganisms grown in blood culture flasks using liquid chromatography–tandem mass spectrometry

Author:

Berendsen Erwin M1,Levin Evgeni2,Braakman René1,der Riet-van Oeveren Debora van1,Sedee Norbert JA1,Paauw Armand1

Affiliation:

1. Department of CBRN Protection, Netherlands Organization for Applied Scientific Research TNO, Lange Kleiweg 137, 2288 GJ Rijswijk, The Netherlands

2. Department of Microbiology & Systems Biology, Netherlands Organization for Applied Scientific Research TNO, Utrechtseweg 48, 3704HE Zeist, The Netherlands

Abstract

Aim: Bloodstream infections are a common cause of disease and a fast and accurate identification of the causative agent or agents of bloodstream infections would aid the start of adequate treatment. Materials & methods: A liquid chromatography–tandem mass spectrometry (LC–MS/MS) shotgun proteomics method was developed for the identification of bacterial species directly from blood cultures that were simulated by inoculating blood culture bottles with single or multiple clinically relevant microorganisms. Results: Using LC–MS/MS, the single species were correctly identified in 100% of the blood cultures, whereas for polymicrobial infections, 78% of both species were correctly identified in blood cultures. Conclusion: The LC–MS/MS method allows for the identification of the causative agent of positive blood cultures.

Publisher

Future Medicine Ltd

Subject

Microbiology (medical),Microbiology

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